It could well be the nostril. No there is definately no discharge or sneezing. He seems to breath normally. The droppings are normal (solid etc etc).
We have guinea fowl (2) and 5 Hens. This last weekend we introduced the peafowl (so he is happy). The bump doesnt seem to effect him. It comes and goes (like there for a day and then not there for 2 days. Do they store food there perhaps? It seems to be directly under his eye. Hope the extra info helps.
There are quite a few health problems that can be found in peafowl, from internal and external parasites, bacteria, viruses to protozoa (coccidiosis; black head’ or Histomoniasis; Trichomoniasis and others) . If you notice your birds acting off, contact your local veterinarians to get an idea of what sort of disease(s) are showing up locally. This gives you a solid start at figuring out what’s wrong.
Of note is that Histomoniasis protozoa are often perpetuated by Cecal worms. The worms themselves are relatively harmless in the bird except for this threat. The dormant histomonad can last season to season in the cecal worm eggs.
Bringing a bird in for a hands on exam (better yet, a vet that comes to your property) early on in the symptoms is best. If you cannot arrange this, arrange to bring in a fresh dropping (or several, kept separately) for a fecal float at the very least. The vet will know what else to look for depending on the symptoms you note.
Sometimes a fecal exam won’t be enough and again, you’ll need to bring a bird in.
Diseases like Salmonella Pullorum and S. gallinarum (Fowl typhoid) should be tested for at least yearly (twice a year is best).
Many viral diseases (ie: Newcastle’s) are preventable with vaccination and meticulous cleaning, as well as careful admission of new birds (be sure of their backgrounds).
Safeguard (panacur, fenbendozole) are common worming meds. I’d prefer a definite diagnosis of the parasite before administering. If you’re going to worm on your own anyway, up to 1 mL Safeguard liquid 10% per kilo of bird body weight administered to the bird is a frequent recommendation. If you’re unable to catch/weigh your birds, 3 mL for the younger ones and 5 mL for those up to a year usually works.
I’m assured this is a safe medication, but I’m exceptionally cautious and wouldn’t go above 3 mL administered via direct dose (syringe or eyedropper inside of beak) or food (not in water).
Remember, even though you're seeing one symptom in one place, doesn't mean it's not a disease originating in a different place. Birds are notorious for that because of compact and complex systems that are as different from mammals as they can be.
Good luck with this guy - and I'd really like to know how it goes ok?
Certified Avian Specialist
Cert. Avian Specialist; Int. Assoc.Animal Behavior Consult; Pet Ind. Joint Advisory Council; author